Re: 18 inch All Terrains -
I went with the Hankook Dynapro ATM RF10 on my 2014 Limited with 18" wheels. The original size was 265/60R18, which I kept.
One thing to double check is your spare. The spare is sized to the same circumference as your original tires. If the new tires are a different circumference, then you should find a matching spare.
2014 Jeep Grand Cherokee Limited 4x4 3.6L v6 Billet Silver, Black leather interior (new)
x 2003 Nissan Murano SE AWD 3.5L v6 Sunlit Copper, Black leather interior (new)
x 1995 Ford Mustang 3.8L v6 Automatic Silver, Red cloth interior (used)
x 1986 Mercury Lynx 1.9L 4cyl Manual 3-door Hatchback white, grey cloth interior (used)